Police forces in democratic societies are supposed to safeguard the rights of citizens, and protect their lives and well-being. We think of their role in terms of laws, rules, and regulations — but ultimately, so much of what they do is about psychology and human behavior. It’s about how people react to threats, what they do when they panic, and how far a person will go when they feel they have nothing left to lose. What does behavioral science say about these situations? Could research help predict people’s behavior, and suggest effective and safe tactics? We take a look at what role behavioral science could play in creating better police forces, from crowd control to foot patrol and adding female officers to departments.